/* Component preview styles — generated by build-docs.js */
.component-preview {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-3);
  width: 100%;
}

/* ================================================================
   PREVIEW EXTRAS — Component styles for docs previews
   Part 1: Preview layout utilities (Phase 2: replace inline styles)
   Part 2: Custom preview-only components (avatar, toast, tooltip, etc.)
   Part 3: Core component classes restored from original showcase.css
   ================================================================ */

/* ── Preview Layout Utilities ──
   These classes replace inline style="" in component-previews.js.
   Ensures all layout uses design tokens, preventing hardcoded violations.
   ─────────────────────────────────────────────────────────────────── */

/* Directional variants */
.preview-vertical {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-6);
}

.preview-column {
    flex-direction: column;
    gap: var(--spacing-3);
    align-items: stretch;
}

.preview-column-4 {
    flex-direction: column;
    gap: var(--spacing-4);
    align-items: stretch;
}

.preview-column-tight {
    flex-direction: column;
    gap: var(--spacing-2);
    align-items: stretch;
}

/* Row utilities */
.preview-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-3);
    align-items: center;
}

.preview-row-4 {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-4);
    align-items: center;
}

/* Label */
.preview-label {
    width: calc(var(--spacing, .25rem) * 25);
    /* 100px */
    font-size: var(--font-size-xs);
    color: var(--muted-foreground);
    font-weight: var(--font-weight-semibold);
    flex-shrink: 0;
}

/* Sizing constraints */
.preview-narrow {
    max-width: calc(var(--spacing, .25rem) * 100);
    /* 400px */
}

.preview-narrow-sm {
    max-width: calc(var(--spacing, .25rem) * 75);
    /* 300px */
}

.preview-full {
    width: 100%;
}

/* Alignment utilities */
.preview-start {
    align-items: flex-start;
}

.preview-stretch {
    align-items: stretch;
}

/* Spacer */
.preview-spacer {
    flex: 1;
}

/* ─── Avatar ─── */
.avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background: var(--muted);
    color: var(--muted-foreground);
    font-weight: var(--font-weight-semibold, 600);
    font-family: var(--font-family-sans);
    user-select: none;
    flex-shrink: 0;
    overflow: hidden;
    border: 2px solid var(--background);
}

.avatar-xs {
    width: var(--spacing-6);
    height: var(--spacing-6);
    font-size: var(--font-size-xs);
}

.avatar-sm {
    width: var(--spacing-8);
    height: var(--spacing-8);
    font-size: var(--font-size-xs);
}

.avatar-md {
    width: var(--spacing-10);
    height: var(--spacing-10);
    font-size: var(--font-size-sm);
}

.avatar-lg {
    width: var(--spacing-12);
    height: var(--spacing-12);
    font-size: var(--font-size-base);
}

.avatar-xl {
    width: var(--spacing-14);
    height: var(--spacing-14);
    font-size: var(--font-size-lg);
}

/* ─── Toast ─── */
.toast {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--group-radius-default);
    border: 1px solid var(--border);
    background: var(--card, var(--background));
    box-shadow: var(--shadow-lg);
    font-size: var(--font-size-sm);
    position: relative;
}

.toast-icon {
    flex-shrink: 0;
    margin-top: var(--spacing-0-5);
}

.toast-content {
    flex: 1;
    min-width: 0;
}

.toast-title {
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    color: var(--foreground);
    margin-bottom: var(--spacing-0-5);
}

.toast-message {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium); /* T20: ≤12px legibility */
    color: var(--muted-foreground);
    line-height: var(--font-leading-5);
}

.toast-close {
    position: absolute;
    top: var(--spacing-2);
    right: var(--spacing-2);
    background: none;
    border: none;
    color: var(--muted-foreground);
    cursor: pointer;
    padding: var(--spacing-1);
    border-radius: var(--comp-radius);
    display: flex;
    transition: background var(--motion-preset-hover), color var(--motion-preset-hover);
}

.toast-close:hover {
    background: var(--muted);
    color: var(--foreground);
}

.toast-success {
    border-color: var(--success);
}

.toast-success .toast-icon {
    color: var(--success);
}

.toast-error {
    border-color: var(--destructive);
}

.toast-error .toast-icon {
    color: var(--destructive);
}

.toast-warning {
    border-color: var(--warning);
}

.toast-warning .toast-icon {
    color: var(--warning);
}

.toast-info {
    border-color: var(--info);
}

.toast-info .toast-icon {
    color: var(--info);
}

/* ─── Tooltip ─── */
.tooltip-wrapper {
    position: relative;
    display: inline-block;
}

.tooltip {
    position: absolute;
    padding: var(--spacing-1-5) 12px;
    background: var(--foreground);
    color: var(--background);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    border-radius: var(--comp-radius);
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity 200ms ease, transform 200ms ease;
    z-index: var(--z-index-dropdown);
}

.tooltip-top {
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
}

.tooltip-bottom {
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(-4px);
}

.tooltip-wrapper:hover .tooltip {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ─── Dropdown ─── */
.dropdown-panel {
    min-width: var(--spacing-48);
    background: var(--card, var(--background));
    border: 1px solid var(--border);
    border-radius: var(--group-radius-default);
    padding: var(--spacing-1);
    box-shadow: var(--shadow-lg);
    display: none;
    z-index: var(--z-index-dropdown);
}

.dropdown-panel.show {
    display: block;
}

.dropdown-label {
    padding: var(--spacing-1-5) var(--spacing-3) var(--spacing-1);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--muted-foreground);
    text-transform: uppercase;
    /* T9-exempt: dropdown section label (badge-like) */
    letter-spacing: var(--font-tracking-wide);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-sm);
    color: var(--foreground);
    border-radius: var(--comp-radius);
    cursor: pointer;
    transition: background var(--duration-fast-2) var(--easing-standard);
}

.dropdown-item:hover {
    background: var(--muted);
}

.dropdown-icon {
    display: flex;
    color: var(--muted-foreground);
    flex-shrink: 0;
}

.dropdown-shortcut {
    margin-left: auto;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium); /* T20: ≤12px legibility */
    color: var(--muted-foreground);
    font-family: var(--font-family-sans);
}

.dropdown-separator {
    height: var(--spacing-px);
    background: var(--border);
    margin: var(--spacing-1) 0;
}

.dropdown-destructive {
    color: var(--destructive);
}

.dropdown-destructive:hover {
    background: var(--destructive-muted, rgba(239, 68, 68, 0.08));
}

/* ─── Drawer / Modal Preview ─── */
.drawer-preview {
    background: var(--card, var(--background));
    border: 1px solid var(--border);
    border-radius: var(--section-radius-default);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.drawer-preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--section-padding-default);
}

.drawer-preview-body {
    padding: 0 var(--section-padding-default);
}

.drawer-preview-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-2);
    padding: var(--section-padding-default);
}

/* ─── Divider ─── */
.divider {
    height: var(--spacing-px);
    background: var(--border);
    width: 100%;
}

.divider-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    color: var(--muted-foreground);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
}

.divider-label::before,
.divider-label::after {
    content: '';
    flex: 1;
    height: var(--spacing-px);
    background: var(--border);
}

/* ─── Breadcrumb ─── */
.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 0;
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: var(--font-size-sm);
}

.breadcrumb-item a {
    color: var(--muted-foreground);
    text-decoration: none;
    transition: color 150ms;
}

.breadcrumb-item a:hover {
    color: var(--foreground);
}

.breadcrumb-item.current {
    color: var(--foreground);
    font-weight: var(--font-weight-medium);
}

.breadcrumb-separator {
    color: var(--border);
    padding: 0 var(--spacing-2);
}

.breadcrumb-ellipsis button {
    background: none;
    border: none;
    color: var(--muted-foreground);
    cursor: pointer;
    font-size: var(--font-size-sm);
    padding: 0 var(--spacing-1);
    border-radius: var(--comp-radius);
}

.breadcrumb-ellipsis button:hover {
    background: var(--muted);
}

/* ─── Custom Select ─── */
.custom-select {
    position: relative;
    width: 100%;
}

.custom-select-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    min-height: var(--size-min-width-10);
    padding: var(--spacing-2) var(--spacing-3);
    border: 1px solid var(--input-border);
    border-radius: var(--comp-radius);
    background: var(--input);
    color: var(--foreground);
    font-size: var(--font-size-sm);
    font-family: var(--font-family-sans);
    cursor: pointer;
    transition: border-color var(--duration-normal-2) var(--easing-standard), box-shadow var(--duration-normal-2) var(--easing-standard);
}

.custom-select.open .custom-select-trigger {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-muted);
}

.custom-select:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: var(--comp-radius);
}

.custom-select-option:focus {
    background: var(--muted);
    outline: none;
}

.custom-select-option:focus-visible {
    background: var(--muted);
    outline: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color);
    outline-offset: var(--focus-ring-offset);
}

.custom-select-value {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.custom-select-value.placeholder {
    color: var(--muted-foreground);
}

.custom-select-trigger svg:last-child {
    color: var(--muted-foreground);
    flex-shrink: 0;
    transition: transform var(--duration-fast-2) var(--easing-standard);
}

.custom-select.open .custom-select-trigger svg:last-child {
    transform: rotate(180deg);
}

.custom-select-panel {
    position: absolute;
    top: calc(100% + var(--spacing-1));
    left: 0;
    right: 0;
    min-width: 100%;
    max-height: 20rem;
    overflow-y: auto;
    z-index: var(--z-index-dropdown, 50);
}

.custom-select.open .custom-select-panel {
    display: block;
}

.custom-select-option {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.custom-select-option svg:last-child {
    color: var(--primary);
    opacity: 0;
    flex-shrink: 0;
}

.custom-select-option.selected {
    background: var(--primary-muted, rgba(0, 0, 0, 0.05));
    color: var(--primary);
    font-weight: var(--font-weight-medium);
}

.custom-select-option.selected svg:last-child {
    opacity: 1;
}

/* ─── Input Error States ─── */
.input-error {
    border-color: var(--destructive) !important;
}

.input-error:focus {
    box-shadow: 0 0 0 3px var(--destructive-muted) !important;
}

.input-hint {
    display: block;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium); /* T20: ≤12px legibility */
    color: var(--muted-foreground);
    margin-top: var(--spacing-1);
}

.input-hint-error {
    color: var(--destructive);
}

/* ─── Skeleton Group ─── */
.skeleton-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

/* ─── Card Default (alias) ─── */
.card-default {
    background: var(--card, var(--background));
    border: 1px solid var(--border);
    border-radius: var(--section-radius-default);
    overflow: hidden;
    transition: border-color 200ms ease;
}

.card-default:hover {
    border-color: var(--muted-foreground);
}

/* ─── Sidebar nav-link (preview context) ─── */
.component-preview .nav-link {
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--comp-radius);
    font-size: var(--font-size-sm);
    color: var(--muted-foreground);
    text-decoration: none;
    transition: background var(--motion-preset-hover), color var(--motion-preset-hover);
    cursor: pointer;
}

.component-preview .nav-link:hover {
    background: var(--muted);
    color: var(--foreground);
}

.component-preview .nav-link.active {
    background: var(--primary-muted, rgba(0, 0, 0, 0.05));
    color: var(--primary);
    font-weight: var(--font-weight-semibold);
}

/* ================================================================
   CORE COMPONENT CLASSES — Restored from original showcase.css
   Source: git show 24711c4:explore/shadcn-style/showcase.css
   ================================================================ */

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    min-height: var(--size-min-width-10);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--comp-radius);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    cursor: pointer;
    border: 1px solid transparent;
    transition: background var(--duration-normal-2) var(--easing-standard), color var(--duration-normal-2) var(--easing-standard), box-shadow var(--duration-normal-2) var(--easing-standard), filter var(--duration-normal-2) var(--easing-standard), transform var(--duration-normal-2) var(--easing-standard);
    text-decoration: none;
    line-height: var(--font-leading-none, 1);
    position: relative;
    overflow: hidden;
    font-family: var(--font-family-sans);
}

.btn:active {
    transform: scale(0.97);
}

.btn:disabled {
    opacity: calc(var(--opacity-50) / 100);
    cursor: not-allowed;
    pointer-events: none;
}

.btn-primary {
    background: var(--primary);
    color: var(--primary-foreground);
    box-shadow: var(--shadow-xs);
}

.btn-primary:hover {
    filter: brightness(1.1);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--primary-muted);
    color: var(--primary-muted-foreground);
}

.btn-secondary:hover {
    filter: brightness(0.95);
}

.btn-outline {
    border-color: var(--border);
    background: transparent;
    color: var(--foreground);
}

.btn-outline:hover {
    background: var(--state-layer-hover);
}

.btn-ghost {
    background: transparent;
    color: var(--foreground);
}

.btn-ghost:hover {
    background: var(--state-layer-hover);
}

.btn-destructive {
    background: var(--destructive);
    color: var(--destructive-foreground);
}

.btn-destructive:hover {
    filter: brightness(1.1);
    box-shadow: var(--shadow-md);
}

.btn-link {
    background: transparent;
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 4px;
    border: none;
}

.btn-link:hover {
    text-decoration-thickness: 2px;
}

.btn-sm {
    min-height: var(--size-min-width-8);
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--font-size-xs);
}

.btn-lg {
    min-height: var(--size-min-width-12);
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
}

.btn-icon {
    min-height: var(--size-min-width-10);
    width: var(--size-min-width-10);
    padding: 0;
}

.btn-capsule {
    border-radius: var(--comp-radius-capsule);
}

/* ─── chip (generic capsule shape utility) ─── */
.chip {
    border-radius: var(--comp-radius-capsule);
}

/* ─── Cards ─── */
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--section-radius-default);
    overflow: hidden;
    transition: box-shadow var(--duration-normal-2) var(--easing-standard);
    display: flex;
    flex-direction: column;
}

.card-elevated {
    box-shadow: var(--shadow-md);
}

.card-elevated:hover {
    box-shadow: var(--shadow-lg);
}

.card-interactive {
    cursor: pointer;
    transition: box-shadow var(--duration-normal-2) var(--easing-standard), transform var(--duration-normal-2) var(--easing-standard), border-color var(--duration-normal-2) var(--easing-standard);
}

.card-interactive:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
    border-color: var(--primary);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--section-padding-default);
}

.card-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin: 0;
}

.card-body {
    padding: 0 var(--section-padding-default);
}

.card-text {
    font-size: var(--font-size-sm);
    color: var(--muted-foreground);
    line-height: var(--font-leading-ratio-relaxed);
    margin: 0;
}

.card-footer {
    padding: var(--section-padding-default);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-2);
}

/* ─── Action Group — Platform-aware button group (AG-1→AG-7) ─── */
.action-group {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: var(--spacing-2);
    flex-wrap: wrap;
}

/* Mobile: center, full-width stacked (AG-2, AG-5) */
@media (max-width: 768px) {
    .action-group--responsive {
        flex-direction: column-reverse;
        align-items: stretch;
        gap: var(--spacing-3);
    }

    .action-group--responsive > .btn {
        width: 100%;
        justify-content: center;
    }
}

/* ─── Form Inputs ─── */
.input-group {
    margin-bottom: var(--spacing-4);
}

.label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-1-5);
}

.input {
    width: 100%;
    min-height: var(--size-min-width-10);
    padding: var(--spacing-2) var(--spacing-3);
    border: 1px solid var(--input-border);
    border-radius: var(--comp-radius);
    background: var(--input);
    color: var(--foreground);
    font-size: var(--font-size-sm);
    font-family: var(--font-family-sans);
    outline: none;
    transition: border-color var(--duration-normal-2) var(--easing-standard), box-shadow var(--duration-normal-2) var(--easing-standard);
}

.input::placeholder {
    color: var(--muted-foreground);
}

.input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-muted);
}

.input:disabled {
    opacity: calc(var(--opacity-50) / 100);
    cursor: not-allowed;
    background: var(--muted);
}

/* ─── Checkbox ─── */
.checkbox {
    appearance: none;
    -webkit-appearance: none;
    width: var(--spacing-5);
    height: var(--spacing-5);
    min-width: var(--spacing-5);
    border: 1.5px solid var(--border);
    border-radius: var(--comp-radius-small);
    cursor: pointer;
    transition: background var(--duration-fast-1) var(--easing-standard), border-color var(--duration-fast-1) var(--easing-standard);
    flex-shrink: 0;
    display: grid;
    place-content: center;
}

.checkbox:checked {
    background: var(--primary);
    color: var(--primary-foreground);
    border-color: var(--primary);
}

.checkbox:checked::after {
    content: '';
    width: var(--spacing-1-5);
    height: var(--spacing-2-5);
    border: solid var(--primary-foreground);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    margin-top: calc(var(--spacing-0-5) * -1);
}

.checkbox:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* ─── Radio ─── */
.radio {
    appearance: none;
    -webkit-appearance: none;
    width: var(--spacing-5);
    height: var(--spacing-5);
    min-width: var(--spacing-5);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: border-color var(--duration-fast-1) ease;
    position: relative;
    flex-shrink: 0;
}

.radio:checked {
    border-color: var(--primary);
    border-width: 2px;
}

.radio:checked::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: var(--spacing-2);
    height: var(--spacing-2);
    background: var(--primary);
    color: var(--primary-foreground);
    border-radius: var(--radius-full);
    transform: translate(-50%, -50%);
}

.radio:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* ─── Switch ─── */
.switch {
    width: var(--size-min-width-11);
    min-width: var(--size-min-width-11);
    height: var(--size-min-width-6);
    background: var(--muted);
    border: none;
    border-radius: var(--radius-full);
    position: relative;
    cursor: pointer;
    transition: background var(--duration-normal-1) var(--easing-standard);
}

.switch:hover {
    filter: brightness(0.95);
}

.switch:focus-visible {
    outline: var(--focus-ring-width) var(--focus-ring-style) var(--focus-ring-color);
    outline-offset: var(--focus-ring-offset);
}

.switch::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: var(--size-min-width-5);
    height: var(--size-min-width-5);
    background: var(--color-base-white);
    border-radius: var(--radius-full);
    transition: transform var(--duration-normal-1) var(--easing-spring);
    box-shadow: var(--shadow-xs);
}

.switch.active {
    background: var(--primary);
    color: var(--primary-foreground);
}

.switch.active:hover {
    filter: brightness(1.1);
}

.switch.active::after {
    transform: translateX(20px);
}

/* ─── Badges ─── */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-0-5) var(--spacing-2-5);
    border-radius: var(--comp-radius-capsule);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    letter-spacing: var(--font-tracking-wide, 0.025em);
    line-height: var(--font-leading-5);
}

.badge-primary {
    background: var(--primary-muted);
    color: var(--primary-muted-foreground);
}

.badge-secondary {
    background: var(--secondary);
    color: var(--secondary-foreground);
}

.badge-success {
    background: var(--success-muted);
    color: var(--success-muted-foreground);
}

.badge-warning {
    background: var(--warning-muted);
    color: var(--warning-muted-foreground);
}

.badge-destructive {
    background: var(--destructive-muted);
    color: var(--destructive-muted-foreground);
}

.badge-info {
    background: var(--info-muted);
    color: var(--info-muted-foreground);
}

.badge-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--foreground);
}

/* ─── Alerts ─── */
.alert {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--comp-radius);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

.alert-info {
    background: var(--info-muted);
    color: var(--info-muted-foreground);
}

.alert-success {
    background: var(--success-muted);
    color: var(--success-muted-foreground);
}

.alert-warning {
    background: var(--warning-muted);
    color: var(--warning-muted-foreground);
}

.alert-destructive {
    background: var(--destructive-muted);
    color: var(--destructive-muted-foreground);
}

.alert svg {
    flex-shrink: 0;
}

/* ─── Tabs ─── */
.tabs {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.tab-list {
    display: flex;
    gap: var(--spacing-0-5);
    background: var(--muted);
    border-radius: var(--comp-radius);
    padding: var(--spacing-0-75);
}

.tab {
    padding: var(--spacing-2) var(--spacing-4);
    cursor: pointer;
    color: var(--muted-foreground);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    border-radius: calc(var(--comp-radius) - 2px);
    transition: background var(--duration-normal-2) var(--easing-standard), color var(--duration-normal-2) var(--easing-standard);
    flex: 1;
    text-align: center;
    background: transparent;
    border: none;
}

.tab:hover {
    color: var(--foreground);
}

.tab.active {
    background: var(--input);
    color: var(--input-foreground, var(--foreground));
    font-weight: var(--font-weight-semibold);
    box-shadow: var(--shadow-xs);
}

/* — Tab icon slot — */
.tab__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.tab__icon svg {
    flex-shrink: 0;
}

/* ─── M3 Primary Tabs ─── */
.tab-list--primary {
    background: transparent;
    border-radius: 0;
    padding: 0;
    gap: 0;
    border-bottom: 1px solid var(--border);
}

.tab--primary {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-3) var(--spacing-4);
    min-height: calc(var(--spacing) * 12);
    border-radius: 0;
    position: relative;
    color: var(--muted-foreground);
    font-weight: var(--font-weight-medium);
}

.tab--primary::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--spacing-0-5);
    right: var(--spacing-0-5);
    height: var(--spacing-0-75);
    border-radius: var(--spacing-0-75) var(--spacing-0-75) 0 0;
    background: transparent;
    transition: background var(--duration-normal-2) var(--easing-standard);
}

.tab--primary:hover {
    background: var(--state-layer-hover, rgba(0,0,0,0.04));
    color: var(--primary);
}

.tab--primary.active {
    background: transparent;
    color: var(--primary);
    font-weight: var(--font-weight-semibold);
    box-shadow: none;
}

.tab--primary.active::after {
    background: var(--primary);
}

/* ─── M3 Secondary Tabs ─── */
.tab-list--secondary {
    background: transparent;
    border-radius: 0;
    padding: 0;
    gap: 0;
    border-bottom: 1px solid var(--border);
}

.tab--secondary {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-1-5);
    padding: var(--spacing-3) var(--spacing-4);
    min-height: calc(var(--spacing) * 12);
    border-radius: 0;
    position: relative;
    color: var(--muted-foreground);
    font-weight: var(--font-weight-medium);
}

.tab--secondary::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: calc(var(--spacing) * 0.5);
    background: transparent;
    transition: background var(--duration-normal-2) var(--easing-standard);
}

.tab--secondary:hover {
    background: var(--state-layer-hover, rgba(0,0,0,0.04));
    color: var(--foreground);
}

.tab--secondary.active {
    background: transparent;
    color: var(--foreground);
    font-weight: var(--font-weight-semibold);
    box-shadow: none;
}

.tab--secondary.active::after {
    background: var(--primary);
}

/* ─── Segment Tabs (iOS Segmented Control) ─── */
.tab-list--segment {
    background: var(--muted);
    border-radius: var(--radius-full, 9999px);
    padding: var(--spacing-0-75);
    gap: var(--spacing-0-5);
}

.tab--segment {
    border-radius: var(--radius-full, 9999px);
    padding: var(--spacing-1-5) var(--spacing-3);
    color: var(--muted-foreground);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    transition: background var(--duration-normal-1) var(--easing-standard), color var(--duration-normal-1) var(--easing-standard), box-shadow var(--duration-normal-1) var(--easing-standard);
}

.tab--segment:hover {
    color: var(--foreground);
}

.tab--segment.active {
    background: var(--input);
    color: var(--input-foreground, var(--foreground));
    font-weight: var(--font-weight-semibold);
    box-shadow: var(--shadow-xs);
}

/* ─── Accordion ─── */
.accordion {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.accordion-item {
    border: 1px solid var(--border);
    border-radius: var(--comp-radius);
    overflow: hidden;
}

.accordion-header {
    padding: var(--spacing-3) var(--spacing-4);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    transition: background var(--duration-normal-2) var(--easing-standard);
}

.accordion-header:hover {
    background: var(--state-layer-hover);
}

.accordion-content {
    padding: 0 var(--spacing-4) var(--spacing-4);
    display: none;
    color: var(--muted-foreground);
    font-size: var(--font-size-sm);
    line-height: var(--font-leading-ratio-relaxed);
}

.accordion-item.open .accordion-content {
    display: block;
}

.chevron {
    transition: transform var(--duration-normal-1) ease;
    font-size: var(--font-size-2xs);
    color: var(--muted-foreground);
}

.accordion-item.open .chevron {
    transform: rotate(180deg);
}

/* ─── Progress ─── */
.progress-bar {
    height: var(--spacing-2);
    background: var(--muted);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--primary);
    color: var(--primary-foreground);
    border-radius: var(--radius-full);
    transition: width var(--duration-slow-2) ease;
}

.progress-warning {
    background: var(--warning);
    color: var(--warning-foreground);
}

.progress-success {
    background: var(--success);
    color: var(--success-foreground);
}

/* ─── Slider ─── */
.slider {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
    touch-action: none;
    user-select: none;
    cursor: pointer;
    padding: var(--spacing-2) 0;
}

.slider-track {
    position: relative;
    flex: 1;
    height: var(--spacing-1-5);
    background: var(--muted);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.slider-range {
    position: absolute;
    height: 100%;
    background: var(--primary);
    border-radius: var(--radius-full);
}

.slider-thumb {
    position: absolute;
    width: var(--spacing-5);
    height: var(--spacing-5);
    background: var(--background);
    border: 2px solid var(--primary);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-sm);
    cursor: grab;
    transition: box-shadow var(--duration-normal-2) var(--easing-standard), transform var(--duration-normal-2) var(--easing-standard), border-color var(--duration-normal-2) var(--easing-standard);
    transform: translateX(-50%);
    z-index: var(--z-index-docked, 1);
    outline: none;
}

.slider-thumb:hover {
    box-shadow: 0 0 0 4px var(--primary-muted);
    transform: translateX(-50%) scale(1.1);
}

.slider-thumb:focus-visible {
    box-shadow: 0 0 0 4px var(--primary-muted);
}

.slider-thumb:active {
    cursor: grabbing;
    transform: translateX(-50%) scale(1.15);
    box-shadow: 0 0 0 6px var(--primary-muted);
}

/* Tooltip */
.slider-tooltip {
    position: absolute;
    bottom: calc(100% + var(--spacing-2));
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    padding: var(--spacing-1) var(--spacing-2);
    background: var(--foreground);
    color: var(--background);
    font-size: var(--font-size-2xs);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-md);
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--duration-normal-2) var(--easing-standard), transform var(--duration-normal-2) var(--easing-standard);
}

.slider-thumb:hover .slider-tooltip,
.slider-thumb:active .slider-tooltip,
.slider-thumb.dragging .slider-tooltip {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Tooltip arrow */
.slider-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 4px solid transparent;
    border-top-color: var(--foreground);
}

/* Disabled */
.slider.disabled {
    opacity: calc(var(--opacity-50, 50) / 100);
    cursor: not-allowed;
    pointer-events: none;
}

/* ─── Skeleton ─── */
.skeleton {
    background: linear-gradient(90deg, var(--muted) 25%, var(--border) 50%, var(--muted) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}

/* ================================================================
   SLOT SYSTEM — Structural layout regions + placeholder visualization
   - Structural: .slot-header, .slot-body, .slot-footer (+ variants)
   - Identity:   [data-slot] attribute selectors
   - Placeholder: indigo dev-mode visualization for empty slots
   - Density:    auto-scaling via --_slot-padding inheritance
   Ref: knowledge/slot-manifest.json, stacking_design_methodology.md §8
   ================================================================ */

/* ─── Slotted Container ─── */
.slotted {
    display: flex;
    flex-direction: column;
    padding: 0;
}

/* ─── Slot Header ─── */
.slot-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--section-padding-default);
    border-bottom: 1px solid var(--border);
    gap: var(--spacing-3);
}

.slot-header-clean {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--section-padding-default);
    padding-bottom: 0;
    gap: var(--spacing-3);
}

/* ─── Slot Body ─── */
.slot-body {
    padding: 0 var(--section-padding-default);
    flex: 1;
    overflow: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.slot-body-flush {
    padding: 0;
    flex: 1;
    overflow: auto;
}

.slot-body-compact {
    padding: 0 var(--section-padding-default);
    flex: 1;
    overflow: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

/* ─── Slot Footer ─── */
.slot-footer {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: var(--section-padding-default);
    border-top: 1px solid var(--border);
    gap: var(--spacing-2);
}

.slot-footer-clean {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: var(--section-padding-default);
    padding-top: 0;
    gap: var(--spacing-2);
}

.slot-footer-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--section-padding-default);
    border-top: 1px solid var(--border);
    gap: var(--spacing-2);
}

/* ─── Placeholder Visualization (dev mode) ─── */
[data-slot]:empty,
[data-slot][data-placeholder] {
    background: var(--utility-slot);
    border: 1px dashed var(--utility-slot-border);
    border-radius: var(--comp-radius);
    min-height: var(--spacing-12);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--duration-fast-2) var(--easing-standard);
}

[data-slot]:empty::after,
[data-slot][data-placeholder]::after {
    content: attr(data-slot);
    color: var(--utility-slot-border);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    /* T9-exempt: slot placeholder label (badge-like) */
    letter-spacing: var(--font-tracking-wider, 0.05em);
    font-family: var(--font-family-sans);
}

/* Dark mode placeholder */
[data-theme="dark"] [data-slot]:empty,
[data-theme="dark"] [data-slot][data-placeholder],
.dark [data-slot]:empty,
.dark [data-slot][data-placeholder] {
    background: var(--utility-slot-dark);
    border-color: var(--utility-slot-border-dark);
}

[data-theme="dark"] [data-slot]:empty::after,
[data-theme="dark"] [data-slot][data-placeholder]::after,
.dark [data-slot]:empty::after,
.dark [data-slot][data-placeholder]::after {
    color: var(--utility-slot-border-dark);
}

/* Placeholder hover — shows it's interactive/fillable */
[data-slot]:empty:hover,
[data-slot][data-placeholder]:hover {
    background: var(--color-indigo-50, #e0e7ff);
    border-color: var(--color-indigo-500, #818cf8);
    cursor: default;
}

/* pipeline-proof-test */

/* ═══════════════════════════════════════════════════════════
   DS-LEADICON — Leading icon with optional container
   Layer-neutral (ds- prefix). Sibling of ds-icon.
   Shapes: circle (radius-full) | square (comp-radius = density-aware)
   Sizes: xs(24) sm(28) md(32 default) lg(40) xl(48)
   ═══════════════════════════════════════════════════════════ */

/* ─── Base — default: md, circle, primary-muted ─── */
.ds-leadicon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: var(--spacing-8);
    height: var(--spacing-8);
    border-radius: var(--radius-full);
    background: var(--primary-muted);
    color: var(--accent-foreground);
    transition: background var(--duration-fast-2) var(--easing-standard),
        color var(--duration-fast-2) var(--easing-standard);
}

.ds-leadicon svg {
    flex-shrink: 0;
    width: var(--icon-md);
    height: var(--icon-md);
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* ─── Sizes ─── */
.ds-leadicon--xs {
    width: var(--spacing-6);
    height: var(--spacing-6);
}

.ds-leadicon--xs svg {
    width: var(--icon-sm);
    height: var(--icon-sm);
}

.ds-leadicon--sm {
    width: var(--spacing-7);
    height: var(--spacing-7);
}

.ds-leadicon--sm svg {
    width: var(--icon-sm);
    height: var(--icon-sm);
}

/* md = default — no modifier */

.ds-leadicon--lg {
    width: var(--spacing-10);
    height: var(--spacing-10);
}

.ds-leadicon--lg svg {
    width: var(--icon-lg);
    height: var(--icon-lg);
}

.ds-leadicon--xl {
    width: var(--spacing-12);
    height: var(--spacing-12);
}

.ds-leadicon--xl svg {
    width: var(--icon-lg);
    height: var(--icon-lg);
}

/* ─── Shapes ─── */
.ds-leadicon--circle {
    border-radius: var(--radius-full);
}

.ds-leadicon--square {
    border-radius: var(--comp-radius);
}

/* density-aware! */

/* ─── Naked (bare icon, no bg container) ─── */
.ds-leadicon--naked {
    background: transparent;
    color: var(--foreground);
}

/* ─── Semantic Colors — Contained ─── */
.ds-leadicon--primary {
    background: var(--primary);
    color: var(--primary-foreground);
}

.ds-leadicon--primary-muted {
    background: var(--primary-muted);
    color: var(--accent-foreground);
}

.ds-leadicon--destructive {
    background: var(--destructive);
    color: var(--destructive-foreground);
}

.ds-leadicon--destructive-muted {
    background: var(--destructive-muted);
    color: var(--destructive-muted-foreground);
}

.ds-leadicon--success {
    background: var(--success);
    color: var(--success-foreground);
}

.ds-leadicon--success-muted {
    background: var(--success-muted);
    color: var(--success-muted-foreground);
}

.ds-leadicon--warning {
    background: var(--warning);
    color: var(--warning-foreground);
}

.ds-leadicon--warning-muted {
    background: var(--warning-muted);
    color: var(--warning-muted-foreground);
}

.ds-leadicon--info {
    background: var(--info);
    color: var(--info-foreground);
}

.ds-leadicon--info-muted {
    background: var(--info-muted);
    color: var(--info-muted-foreground);
}

.ds-leadicon--muted {
    background: var(--muted);
    color: var(--muted-foreground);
}

/* ─── Semantic Colors — Naked (icon-only, no bg) ─── */
.ds-leadicon--naked.ds-leadicon--primary {
    background: transparent;
    color: var(--primary);
}

.ds-leadicon--naked.ds-leadicon--primary-muted {
    background: transparent;
    color: var(--primary-muted-foreground);
}

.ds-leadicon--naked.ds-leadicon--destructive {
    background: transparent;
    color: var(--destructive);
}

.ds-leadicon--naked.ds-leadicon--destructive-muted {
    background: transparent;
    color: var(--destructive-muted-foreground);
}

.ds-leadicon--naked.ds-leadicon--success {
    background: transparent;
    color: var(--success);
}

.ds-leadicon--naked.ds-leadicon--success-muted {
    background: transparent;
    color: var(--success-muted-foreground);
}

.ds-leadicon--naked.ds-leadicon--warning {
    background: transparent;
    color: var(--warning);
}

.ds-leadicon--naked.ds-leadicon--warning-muted {
    background: transparent;
    color: var(--warning-muted-foreground);
}

.ds-leadicon--naked.ds-leadicon--info {
    background: transparent;
    color: var(--info);
}

.ds-leadicon--naked.ds-leadicon--info-muted {
    background: transparent;
    color: var(--info-muted-foreground);
}

.ds-leadicon--naked.ds-leadicon--muted {
    background: transparent;
    color: var(--muted-foreground);
}

/* ─── M1: Accessibility — Reduced Motion ─── */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}